22 lines
759 B
Rust
22 lines
759 B
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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pub fn main() {
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// sometimes we have had trouble finding
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// the right type for f, as we unified
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// bot and u32 here
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let f = match "1234".parse::<usize>().ok() {
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None => return (),
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Some(num) => num as u32
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};
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assert_eq!(f, 1234);
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println!("{}", f)
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}
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